[maemo-developers] Python + hildon.TouchSelector (with pixbufs)

[From: Brent Chiodo]

Hi Claudio,

Thanks for the response.

The reason I'm creating the dialog by hand is because I want complete
control over it's look and feel. In addition,
hildon.PickerButton.set-image() is not working here so i thought it's
probably best to use plain old GTK.

Concerning the rest of the problems, I'm going to chalk it up to a bug in
the bindings because I seem to be doing everything properly. All of the
(working) examples I could found online are using Windows to hold the
Selector and not Dialogs, so maybe this is the source of the issue.

I'm going to work more today creating a Selector with pixbufs and hope that
the scrolling problem will get resolved at some point (I'll file a bug).

Of course, a resonse from one of the Python Devs is always welcome ;)


P.S. I'm not doing this in C because i don't know how to program in C, only
Python.


On Sun, Aug 30, 2009 at 12:49 PM, Claudio Saavedra <csaavedra at igalia.com>wrote:

> El dom, 30-08-2009 a las 12:20 -0400, Brent Chiodo escribió:
> > I'm trying to create a simple dialog that opens when you tap a button.
> > In this dialog, I want to place in it a hildon.TouchSelector that has
> > a single column comprised of pixbufs (logos of websites).
>
> For this use case, I'd recommend you using directly a HildonPickerButton
> instead of creating a button, a dialog, and all the logic by hand. Check
> the docs for HildonPickerbutton.
>
> > Just to see if I could get a TouchSelector working, I created a simple
> > one that just uses text labels instead of pixbufs. Here is the
> > pertinent part of the code:
> >
> >
> > # This part is the button that opens the dialog
> >
> >       self.select_button = gtk.Button()
> >       self.select_icon =
> >
> gtk.gdk.pixbuf_new_from_file_at_size("/usr/share/touchsearch/select_search_engine.png",
> 40, 40)
> >       self.select_image = gtk.Image()
> >       self.select_image.set_from_pixbuf(self.select_icon)
> >       self.select_image.set_padding(settings['padding'],
> > settings['padding'])
> >       self.select_button.set_image(self.select_image)
> >       self.select_button.connect("clicked", self.select_engine_dialog)
> >       self.select_button.show_all()
> >
> > ...
> >
> > # And this is the dialog with the Touchselector in it
> >
> >    def select_engine_dialog(self, widget):
> >       dialog = gtk.Dialog("Select A Site To Search", None,
> > gtk.DIALOG_DESTROY_WITH_PARENT | gtk.DIALOG_NO_SEPARATOR)
> >       close_button = dialog.add_button(gtk.STOCK_CLOSE,
> > gtk.RESPONSE_CLOSE)
> >
> >       selector = hildon.hildon_touch_selector_new_text()
> >       searches = ["Google", "eBay", "Amazon", "Merriam-Webster",
> > "Google Maps", "Google Images", "maemo.org"]
> >       for i in searches:
> >          selector.append_text(i)
> >
> >       dialog.vbox.add(selector)
> >       dialog.show_all()
> >       response = dialog.run()
> >       dialog.destroy()
> >
> >
> > When I run this example I get exactly what I expected except the
> > TouchSelector doesn't scroll -- when I drag it in either direction it
> > shows me the indicator of where the focus is, but it doesn't move.
> >
> > Errors from traceback are:
> >
> > /usr/lib/hildon-desktop/touchsearch.py:68: Warning: cannot register
> > existing type `HildonPannableAreaMode'
> >   selector = hildon.hildon_touch_selector_new_text()
> > /usr/lib/hildon-desktop/touchsearch.py:68: Warning: g_param_spec_enum:
> > assertion `G_TYPE_IS_ENUM (enum_type)' failed
> >   selector = hildon.hildon_touch_selector_new_text()
> > /usr/lib/hildon-desktop/touchsearch.py:68: Warning:
> > g_object_class_install_property: assertion `G_IS_PARAM_SPEC (pspec)'
> > failed
> >   selector = hildon.hildon_touch_selector_new_text()
> > /usr/lib/hildon-desktop/touchsearch.py:68: Warning: cannot register
> > existing type `HildonMovementMode'
> >   selector = hildon.hildon_touch_selector_new_text()
> > /usr/lib/hildon-desktop/touchsearch.py:68: Warning:
> > g_param_spec_flags: assertion `G_TYPE_IS_FLAGS (flags_type)' failed
> >   selector = hildon.hildon_touch_selector_new_text()
> > /usr/lib/hildon-desktop/touchsearch.py:68: Warning: cannot register
> > existing type `HildonSizeRequestPolicy'
>
> I am not familiar with the python bindings, so I have not much to say
> about these errors other than it seems that the registration of some of
> the types fail, which is strange..
>
> >
> >
> > In addition to that, once I get that working how would I go about
> > getting pixbufs in there instead of just text? I'm familiar with how
> > to create a gtk.TreeView,
>
> HildonTouchSelector uses HildonTouchSelectorColumn for each of its
> columns. Since you want one single column, you need to create one and
> use the GtkCellLayout interface in the same way you would do for
> GtkTreeViewColumn.
>
>
> > but don't know how to apply this knowledge to a Touchelector e.g. the
> > example found here:
> >
> >
> http://pymaemo.garage.maemo.org/documentation/python_hildon_tutorial/html/ch-Selectors.html#example-of-a-selector-with-a-custom-column
> >
> > ...doesn't work.
>
> Maybe the python bindings are not fully working? Did you try with C
> instead?
>
> Claudio
>
>
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>



-- 
Best Regards,

Brent Chiodo
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